This nifty little tool helps you create a package perfectly wound to fit your AVL Shuttle. A perfect package, of course, is a tightly wound pirn of consistent diameter sized to exactly fit the package area of the shuttle, not too large, not too small, just right. Tighter windings mean more yarn per bobbin, resulting in fewer bobbin changes and less interruption in your weaving. Consistent windings aid yarn delivery, which improves the speed and action of your shuttle. Increase your weaving speed immediately with an AVL Winding Guide.Made from one of several select hardwoods.